package cn.zhizihua.interceptor;

import cn.zhizihua.domain.vo.ResultBean;
import com.fasterxml.jackson.databind.ObjectMapper;
import org.springframework.web.servlet.HandlerInterceptor;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 管理员前端的登录拦截器
 *
 * 配置 WebMvcConfig 类中
 */
public class LoginInterceptor implements HandlerInterceptor {

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        HttpSession session = request.getSession();
        System.out.println("--------登录验证----"+session.getId()+"-----------");
        Object adminUser = session.getAttribute("adminUser");
        System.out.println("------------------"+adminUser);
        if (adminUser==null){

            //将失败的ResultBean转成json字符串
            ObjectMapper objectMapper = new ObjectMapper();
            String json = objectMapper.writeValueAsString(ResultBean.ERROR(50001, "未登录"));

            //设置响应数据的类型和编码  写出去
            response.setContentType("application/json;charset=UTF-8");
            response.getWriter().write(json);

            //不放行
            return false;
        }

        //放行
        return true;
    }
}